Hi,
I don't have much to contribute, but according to the source code [1]
this seems to be a non-fatal message:
void CreatePrimaryRequest<I>::handle_unlink_peer(int r) {
CephContext *cct = m_image_ctx->cct;
ldout(cct, 15) << "r=" << r << dendl;
if (r < 0) {
lderr(cct) << "failed to unlink peer: " << cpp_strerror(r) << dendl;
finish(0); // not fatal
return;
}
I guess if you increased debug level to 15, you might see where
exactly that message comes from. But I don't know how to get rid of
them, so maybe one of the devs can comment on that.
Regards,
Eugen
[1]
https://github.com/ceph/ceph/blob/v17.2.7/src/librbd/mirror/snapshot/CreatePrimaryRequest.cc#L260
Zitat von Scott Cairns <Scott.Cairns@xxxxxxxxxxxxxxxxx>:
Hi,
Following the introduction of an additional node to our Ceph
cluster, we've started to see unlink errors when taking a rbd mirror
snapshot.
We've had RBD mirroring configured for over a year now and it's been
working flawlessly, however after we created OSD's on a new node
we've receiving the following error:
librbd::mirror::snapshot::CreatePrimaryRequest: 0x7f60c80056f0
handle_unlink_peer: failed to unlink peer: (2) No such file or
directory
This seemed to appear on around 3 of 150 snapshots on the first
night and over the weeks has progressed to almost every snapshot.
What's odd, is that the snapshot appears to be taken without any
issues and does mirror to the DR site - we can see the snapshot ID
taken on the source side is mirrored to the destination side when
checking the rbd snap ls, and we've tested promoting an image on the
DR site to ensure the snapshot does include up to date data, which
it does.
I can't see any other errors generated when the snapshot is taken to
identify what file/directory isn't found - everything appears to be
working okay it's just generating an error during the snapshot.
I've also tried disabling mirroring on the disk and re-enabling
however it doesn't appear to make any difference - there's no error
on the initial mirror image, or the first snapshot taken after that,
but every subsequent snapshot shows the error again.
Any ideas?
Thanks,
Scott
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